Pocket guide to the common land birds of New England - Willcox, M. A. (Mary Alice), 1856 -1953 (Lee and Shepard, 1895)

Pocket key of the birds of the northern United States, east of the Rocky Mountains - Apgar, A. C. (Austin Craig), 1838 -1908 (J.L. Murphy Pub. Co., Printers, 1893)

A pocket list of the birds of eastern Massachusetts, with especial reference to Essex County - Morse, Albert P. (Albert Pitts), 1863 -1936 (Peabody academy of science, 1912)

A popular handbook of the birds of Canada and the United States - Nuttall, Thomas, 1786 -1859 (Musson Book Co, 1907)

A popular handbook of the birds of the United States and Canada - Nuttall, Thomas, 1786 -1859 (Little, Brown, 1903)

A popular handbook of the birds of the United States and Canada - Nuttall, Thomas, 1786 -1859 (Little, Brown, 1905)

A popular handbook of the birds of the United States and Canada - Nuttall, Thomas, 1786 -1859 (Little, Brown, 1921)

A popular handbook of the birds of the United States and Canada - Nuttall, Thomas, 1786 -1859 (Little, Brown, 1919)

A popular Handbook of the Ornithology of Eastern North America - Nuttall, Thomas, 1786 -1859 (Truslove and Hanson, 1894)

A popular handbook of the ornithology of eastern North America - Nuttall, Thomas, 1786 -1859 (Little, Brown, and Company, 1896)

A popular handbook of the ornithology of the United States and Canada, based on Nuttall's Manual - Nuttall, Thomas, 1786 -1859 (Little, Brown, and Company, 1891)

Rapport annuel = Annual report - Société Provancher d'histoire naturelle du Canada. (Provancher Society of Natural History of Canada, 1947)

Portraits and habits of our birds - Pearson, T. Gilbert (Thomas Gilbert), 1873 -1943 (National association of Audubon societies, 1921)

Portraits and habits of our birds - Pearson, T. Gilbert (Thomas Gilbert), 1873 -1943 (National Association of Audubon Societies, 1925)

Postilla - Peabody Museum of Natural History. (Peabody Museum of Natural History, 1968)

Potential wildlife-highway interactions at select mile-markers along Montana Department of Transportation routes an ArcView GIS analysis - Irby, Lynn R. (Fish and Wildlife Management Program, Montana State University, 2001)

Praktische Naturgeschichte der Vögel, für Gebildete aller Stände - Reichenbach, A. B. (Anton Benedikt), 1807 -1880 (1850)

A preliminary catalog of the birds of Missouri - Widmann, Otto (Academy of Science of St. Louis, 1907)

A preliminary catalog of the birds of Missouri - Widmann, Otto (Academy of Sciences of St. Louis?, 1907)

A preliminary list of the birds found in Vermont - Perkins, George H. (George Henry), 1844 -1933 (Wynkoop Hallenbeck Crawford Co, 1901)

A preliminary list of the birds of Jones Beach, Long Island, N.Y - Linnaean Society of New York (Linnaean Society of New York, 1935)

A preliminary list of the birds of Wayne County, Ohio - Oberholser, Harry C. (Harry Church), 1870 -1963 (Westbote Co., State Printers, 1896)

Preliminary report of explorations in Nebraska and Dakota, in the years 1855-'56-'57 - Warren, Gouverneur Kemble, 1830 -1882 (Govt. Print. Off, 1875)

Preliminary report of the United States Geological Survey of Wyoming : and portions of contiguous territories, (being a second annual report of progress) - Geological; Geographical Survey of the Territories (U.S.) (Govt. Print. Off, 1872)

A preliminary report on the biology of Harding County, northwestern South Dakota - Visher, Stephen Sargent, 1887 -1967 (State Publishing Co, 1914)

A preliminary review of the birds of Nebraska : with synopses - Wolcott, Robert Henry, 1868 -1934 (Klopp & Bartlett Co, 1904)

Proceedings - Essex Institute. (1856)

The proceedings and transactions of the Nova Scotian Institute of Science, Halifax, Nova Scotia - Nova Scotian Institute of Science. (Printed for the Institute by W. McNab, 1895)

The Proceedings and transactions of the Nova Scotian Institute of Science - Nova Scotian Institute of Science. (Nova Scotian Institute of Science, 1902)

Proceedings and transactions of the Nova Scotian Institute of Natural Science - Nova Scotian Institute of Natural Science. (Nova Scotian Institute of Natural Science, 1886)

The Proceedings and transactions of the Nova Scotian Institute of Science - Nova Scotian Institute of Science. (Nova Scotian Institute of Science, 1915)

The Proceedings and transactions of the Nova Scotian Institute of Science - Nova Scotian Institute of Science. (Nova Scotian Institute of Science, 1918)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1846)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1852)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1866)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1875)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1883)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1893)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1895)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1896)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1903)

Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge - American Philosophical Society. (American Philosophical Society, 1838)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1921)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1929)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1935)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1990)

Proceedings of the Boston Society of Natural History - Boston Society of Natural History. (Boston Society of Natural History, 1865)

Proceedings of the Boston Society of Natural History - Boston Society of Natural History. (Boston Society of Natural History, 1872)

Proceedings of the Boston Society of Natural History - Boston Society of Natural History. (Boston Society of Natural History, 1873)

Proceedings of the Boston Society of Natural History - Boston Society of Natural History. (Boston Society of Natural History, 1874)

Proceedings of the Boston Society of Natural History - Boston Society of Natural History. (Boston Society of Natural History, 1875)

Proceedings of the Boston Society of Natural History - Boston Society of Natural History. (Boston Society of Natural History, 1907)

Proceedings of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 1888)

Proceedings of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 1889)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1919)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1927)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1932)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1931)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1936)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1935)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1951)

Proceedings of the Davenport Academy of Natural Sciences - Davenport Academy of Natural Sciences. (Academy of Natural Sciences [etc.], 1885)

Proceedings of the Davenport Academy of Natural Sciences - Davenport Academy of Natural Sciences. (Academy of Natural Sciences [etc.], 1910)

Proceedings of the Elliott Society of Science & Art of Charleston, South Carolina - Elliott Society of Science & Art. (s.n, 1859)

Proceedings of the Essex Institute - Essex Institute. (Essex Institute Press, 1848)

Proceedings of the Essex Institute - Essex Institute. (Essex Institute Press, 1860)

Proceedings of the Essex Institute - Essex Institute. (Essex Institute Press, 1864)

Proceedings of the Essex Institute - Essex Institute. (Essex Institute Press, 1866)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1894)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1895)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1897)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1900)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1904)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1918)

Proceedings of the International Ornithological Congress (Australian Academy of Science [etc.], 1929)

Proceedings of the International Ornithological Congress (Australian Academy of Science [etc.], 1960)

Proceedings of the International Ornithological Congress (Australian Academy of Science [etc.], 1962)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1917)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1919)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1920)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1922)

Proceedings of the Linnaean Society of New York ... - Linnaean Society of New York (Linnaean Society of New York, 1933)

Proceedings of the Linnaean Society of New York ... - Linnaean Society of New York (Linnaean Society of New York, 1935)

Proceedings of the Linnaean Society of New York ... - Linnaean Society of New York (Linnaean Society of New York, 1941)

Proceedings of the Linnaean Society of New York ... - Linnaean Society of New York (Linnaean Society of New York, 1954)

Proceedings of the Linnaean Society of New York ... - Linnaean Society of New York (Linnaean Society of New York, 1959)

Proceedings of the Manchester Institute of Arts and Sciences - Manchester Institute of Arts; Sciences. (The Institute, 1900)

Proceedings of the Natural History Association of Miramichi - Natural History Association of Miramichi. (The Association, 1899)

Proceedings of the Nebraska Ornithologists' Union - Nebraska Ornithologists' Union at its ... meeting. (1899)

Proceedings of the Nebraska Ornithologists' Union - Nebraska Ornithologists' Union at its ... meeting. (1908)

Proceedings of the Nova Scotian Institute of Science - Nova Scotian Institute of Science. (Nova Scotian Institute of Science, 1981)

Proceedings of the Nova Scotian Institute of Science - Nova Scotian Institute of Science. (Nova Scotian Institute of Science, 2011)

Proceedings of the Ornithological Sub-section of the Biological Section of the Canadian Institute - Royal Canadian Institute. Biological Section. Ornithological Sub-section. (The Institute, 1890)

Proceedings of the Rochester Academy of Science - Rochester Academy of Science. (The Academy, 1902)

Proceedings of the Symposium on Management of Forest and Range Habitats for Nongame Birds, May 6-9, 1975, Tucson, Arizona - United States. Forest Service. (U.S. Dept. of Agriculture, Forest Service, 1975)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1878)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1885)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1887)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1890)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1893)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1938)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1940)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1957)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1870)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1884)

Programmatic environmental assessment for containment/eradication of noxious plants tiered to the Northwest Area Noxious Weeds Control Program FEIS, 1985, Lewistown District - Montana - United States. Bureau of Land Management. (The District, 1986)

Proposed estuarine sanctuary grant award to the state of New York for a Hudson River estuarine sanctuary - National Ocean Survey. Office of Coastal Zone Management. (U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, Office of Coastal Zone Management, 1982)

The Provencher [sic] Society of Natural History of Canada. Société Provencher [sic] d'histoire naturelle du Canada - Société Provancher d'histoire naturelle du Canada. (1922)

Provincial Museum of Natural History and Enthnology - British Columbia Provincial Museum. (Printed by Richard Wolfenden, 1909)